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New 2026 Forest River RV Sierra 3900HBLR

Fifth Wheel

Stock #055186

Anderson, SC

1 of 58

+58

Sale Price: $74,995
MSRP: $95,645
Save: $20,650

43ft long
13,284 lbs
Sleeps 3

3 slides
Front Bath

Rear Living Area

See All Specs

Specifications

Sleeps	3	Slides	3
Length	42 ft 9 in	Ext Width	8 ft
Ext Height	13 ft 4 in	Int Height	7 ft
Hitch Weight	2085 lbs	GVWR	16085 lbs
Dry Weight	13284 lbs	Cargo Capacity	2801 lbs
Fresh Water Capacity	50 gals	Grey Water Capacity	136 gals
Black Water Capacity	104 gals	Furnace BTU	40000 btu
Available Beds	King	Refrigerator Type	12V
Refrigerator Size	16 cu ft	Cooktop Burners	3
Number of Awnings	2	Axle Weight	7000 lbs
LP Tank Capacity	30 lbs	Water Heater Type	On Demand Tankless
AC BTU	30000 btu	TV Info	LR 50" Flatscreen Smart TV
Awning Info	12' & 18' Electric w/LED Light Strip	Axle Count	2
Washer/Dryer Available	Yes	Number of LP Tanks	2
Shower Type	Standard	Electrical Service	65 amp

Description

Forest River Sierra fifth wheel 3900HBLR highlights:

Three Slides
Entertainment Center
Bath and a Half
Walk-In Bathroom Closet
12V Refrigerator

This fifth wheel is perfect for those seeking a comfortable, feature-rich home on wheels. Upon entering, you'll find a spacious rear living room, ideal for relaxation and entertainment. The room features a comfortable chaise lounge, sofa, and an entertainment center with a cozy fireplace. For added convenience, there's a hidden pantry, desk with a chair, and a shelf and cabinet for storage. The kitchen is well-appointed with a stylish kitchen island featuring a beautiful waterfall edge. Overhead cabinets provide ample storage, while the microwave and 12V refrigerator allow for easy meal prep. Plus, a butler pantry offers additional storage for kitchen essentials. A convenient half bath is located nearby, complete with a stackable washer and dryer prep if you want the option to add these appliances. The bedroom retreat features a comfortable king bed, a small dresser, and a tall dresser with a TV hookup. The adjacent walk-in bathroom closet boasts a one-piece fiberglass shower, dual sink, medicine cabinet, linen closet, and ample storage thanks to the various shelves, perfect for keeping your belongings organized. Exterior features include two awnings, one 12’ and the other 18’, providing ample shade and protection.

Each one of these Forest River Sierra fifth wheels are equipped with everything you need to make the most of each adventure! The underbelly armor will protect your unit's vitals from road debris and the painted two tone aerodynamic fiberglass front cap has an improved turning radius to make them easier to navigate. With an electric leveling system, you can set your unit up quick and easy then get to having fun faster than ever. The cambered powder coated frame with rust prohibitor construction allows for more duration of the fifth wheel. Each model also comes with a TV antenna with booster, 60,000BTU on demand tankless water heater, Goodyear Radial tires with 7,000 lb. axles, and the list goes on. The interior is just as impressive with Beachside Sundance Congoleum linoleum, recessed residential lighting, a memory foam mattress, and hidden hinged, soft close drawers and cabinets!

Features

Standard Features (2026)

Exterior Features

Automatic Electric Level-Up System
2" Towing and Accessory Hitch (Where Available)
7,000lb axles with Anti-lock Braking System
Goodyear Radial Tires w/ anti-lock brakes
Lippert auto adjust brakes
Rich Solar 200W roof mounted solar panel with controller and battery
Quad MORryde® step above with strut (Where Available)
Color matched high gloss gel coated colored exterior fiberglass
Painted two tone aerodynamic fiberglass front cap with improved turning radius
Underbelly Armor
Tire Pressure Monitoring System
Spare tire
Large, tinted windows with 80/20 UV prohibitor
Electric awning with LED light strip
Prepped for Lippert On-The-Go Ladder
Power front jacks with spring loaded pins
Automotive-style fender skirts
Hitch light
Porch light with interior switch
30 lb. double LP tanks with auto change over
Rain gutters with extra long drip spouts (Prevents black streaking)
Insulated heavy duty slam lock baggage doors
Exterior foldable grab handle
Unobstructed pass through storage area
Upgraded aluminum rims
Oversized friction hinge entry door with extended latch (Main Entry)
Exterior LP Quick Connect

Interior Features

Solid Surface Kitchen Counter tops
Fiberglass one-piece shower
Washer and Dryer Prep
7’ slide-out height (Main Slides)
Stainless steel kitchen package
Beachside Sundance Congoleum linoleum
Hidden hinged, soft close drawers and cabinets
Full extension ball bearing drawer guides
Stainless steel under mounted kitchen sink
Trash receptacle in kitchen
Decorative backsplash
Two color coordinated interiors
LED lighting throughout
Recessed residential lighting
Accent lighting over dinette
Extra large, panoramic picture windows throughout
Vented side windows in slide-outs
TV antenna with booster
Solid wood drawer fronts with birch sides
Solid wood, square inset cabinet doors, painted or wood grain
Bedroom slide-out fascia
Memory foam mattress
Teddy Bear® bunk mats
50" flatscreen smart TV (65” 3900HBLR)
JBL Aura Cube FM/Bluetooth media center
Designer window treatment
Ceiling fan
Tri-fold hide-a-bed sofa
Quilted bedspread
Prepped for inverter

Appliances/Systems

Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
AIRDIRECT® Air Vents for improved efficiency
16 cu. ft. 12V refrigerator
60,000BTU On Demand Tankless Water Heater
40,000BTU furnace
Heated Holding Tanks (12V)
Floor ducted 40,000BTU furnace
30" OTR stainless steel microwave
Chef collection 3 burner / 24" oven with drawers
Interior monitor panel for holding tanks
Satellite and cable hookup with RG-6 cable for high quality picture
Porcelain foot flush toilet(s)
65 Amp converter
Power fan in Kitchen and Bathroom(s)

Construction

5/8" tongue and groove DryMax® OSB floor decking
2 x 3 floor joists, 12" on center
Laminated sidewalls
3/8" roof decking (Full walk-on roof)
Cambered powder coated frame with rust prohibitor
Underbelly armor
5" truss roof rafters
R-10, 2" sidewall construction
Laminated slide-out walls

For Your Safety

Smoke alarm
Fire extinguisher
Breakaway switch (Battery hook-up required)
Dead-bolt lock on entry door
LP/CO2 gas detector
Fire escape windows

Popular Options

Two chairs in place of ottoman bench
Cordless vacuum
Slide room awnings (N/A dinette slides)
Washer and Dryer (Standard on 3800RK & 3900HBLR)
Dual pane windows (N/A 3900HBLR 84” Window)
3rd A/C power saver direct dump system w/ wall thermostat

Please see us for a complete list of features and available options!

All standard features and specifications are subject to change.

All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.

Due to the current environment, our features and options are subject to change due to material availability.

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864-231-7258
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Lakeside RV Sales, LLC is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @864-231-7258 for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.

Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.

New 2026 Forest River RV Sierra 3900HBLR

3900HBLR Floorplan

Specifications

Description

Features